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چکیده
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In this work, we functionalized acidic HY Zeolite (Z-HY) by alkylaminopyridine base that is excellent heterogeneous catalyst for synthesis of 4H-chromenes. The prepared catalyst was well characterized by Scanning electron microscopy (SEM), Energy dispersive X-ray analysis (EDX), Fourier transform infrared (FT-IR), Thermogravimetric analysis (TGA), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET) techniques. The results showed that the alkylaminopyridine moiety was supported on HY Zeolite successfully. Hence, this catalyst was used for preparation of 4H-chromenes and obtained results showed that the reaction was carried out in the mild and solvent free condition with short reaction times, high yields and pure products. Furthermore, reusability of the catalyst and solvent free condition makes this method to be green and environmental friendly procedure
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